Improper control of a resource through its lifetime in Junos OS Evolved and Juniper Junos OS

1) Improper control of a resource through its lifetime

EUVDB-ID: #VU82505

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-22250

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper control of a resource through its lifetime error in Packet Forwarding Engine (PFE). A remote non-authenticated attacker can cause a Denial of Service (DoS).

In an EVPN-MPLS scenario, if MAC is learned locally on access interface but later a request to delete is received indicating that the MAC was learnt remotely, it might lead to memory corruption which might result in line card crash and reload.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 20.4 - 22.1-EVO

Juniper Junos OS: 19.2 - 21.4R1

External links

http://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-An-FPC-might-crash-and-reload-if-the-EVPN-MAC-entry-is-move-from-local-to-remote-CVE-2022-22250

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.